CodeMirror keyMap Missing Documentation

codemirror_keymap.md

An addendum to CodeMirror's keyMap documentation, which unfortunately glosses over the 'connecting the wires' section.

CodeMirror.keyMap.tabSpace = {
    Tab: function(cm) {
        var spaces = Array(cm.getOption("indentUnit") + 1).join(" ");
        cm.replaceSelection(spaces, "end", "+input");
    },
    fallthrough: ['basic']
};

var editor = CodeMirror.fromTextArea(code, {
    keyMap: 'tabSpace'
});

Like so:

• keymaps are objects that are assigned to bits of CodeMirror.keyMap
• Your keymap will usually have fallthrough: ['basic'] in it unless you want to reinvent the wheel.

That is all.

Using

fallthrough: ['default']

Works better for me as it includes macros such as ctrl+a for select all.